Bonneville V6-3800 3.8L Supercharged (1992)
Locations 1 or 4: The correction to noise at these locations is to carefully stuff small patches of soft foam in the openings between the inner belt weather
seal lip, the door garnish moldings and the interior trim pad. Do not put foam between the lip and the dropping glass on the rear of the front doors or the
front of the rear doors, as it will simply tear away when the glass is dropped.
Locations 2 and 3: If inspection identifies that the grommet or the base gasket is incorrectly installed, correct the problem and road test for improvement.
If the mirror does not turn up a problem source, re-evaluate the outer belt weather seal for gap to the door surface. Correct as outlined in Chart B1.
Chart B3 Dropping Glass Perimeter Leaks
Dropping glass perimeter leaks not corrected through Charts B1 or B2 will generally be associated with a weak engagement of the glass into the glass
run channel sealing sections. A visual inspection of the problem area should check for such things as local discrepancies in the glass edge or glass run
channel sealing lips; exposed edges of glass that do not penetrate into glass run channel: uneven 'wink-over' of the outer sealing lip along the top edge
and down the vent glass division post: and a gap between the outer sealing lip and glass on the vertical leg (rear of front door only).
Repair Method:
First, identify if the problem is a very local leak caused by a part discrepancy in either the glass or the glass run channel. Often, hard spots on the glass
run channel can be worked out without removing or replacing parts. Glass irregularities can likewise be minimized by adjusting the glass to improve the
fit in the problem area. If simple finesse techniques do not work, then replace parts as required. If the problem is identified as lack of
penetration/wink-over at the top of the door and/or along the vent glass division post (front door only) or applique (rear door only): then readjust the
glass to optimize penetration/wink-over. Generally this means moving the glass up and rearward in the sash on the front door and up and forward in the
sash on the rear door. Cycle the glass several times (with the engine running) to evaluate improvement of the glass position and road test again.
If the problem is along the rear vertical leg of the front door and gapping between glass and the outer sealing lip is evident, refer to Service Bulletin
number 92-10-48 for repair.
Chart B4 Fixed Glass Perimeter Leaks (Vent Glass)